Photographic-printing machine.



W. T. OXLEY. PHOTOGRAPHIC PRINTING MACHINE.

APPLICATION FILED MAY 13, 1909.

Patented Jan. 12, 1915.

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W. T. OXLEY.

PHOTOGRAPHIC PRINTING MACHINE.

APPLICATION FILED MAY 13, 1909.

Patented J an. 12, 1915.

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UNITED STATES PATENT OFFICE.

WALTER T. OXLEY, OF FERGUS FALLS, MINNESOTA.

PHOTOGRAPHIC-PRINTING MACHINE.

Application filed May 13, 1909.

b all whom it may concern Be it known that I, WALTER T. OXLEY, a citizenof the United States, residing at Fergus Falls, in the county ofOttertail and State of Minnesota, have invented certain new and usefulImprovements in Photographic-Printing Machines; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention has'for its object to provide a simple and highly efiicientphotographic printing machine, and to this end, it consists of the noveldevices and combinations of devices hereinafter described and defined inthe claim.

In the accompanying drawings which illustrate the invention, likecharacters indicate like parts throughout the several views.

Referring to the drawings: Figure 1 is a plan view of the improvedmachine parts being broken away; Fig. 2 is a side elevation of the same,some parts being broken away and some parts being sectioned; and Fig. 3is a vertical section taken on the line 412 of Fig. 1.

The numeral 1 indicates a rectangular box or frame, which in front, isprovided with a ground glass plate 2, and to the back of which isdetachably applied a rectangular plate 3, having a rectangular opening4: that is normally closed by a platen 5 of the trap door type, andwhich is connected to said plate 3 at its lower edge by hinges 6. Thisplate 3 constitutes the body member of a printing frame, and has securedto its inner face, a rectangular marginal rim 7. The negative plate 8 isdetachably clamped to the plate 3 by the usual rectangular clampingboard 9, which is preferably detachably connected to clips 10 on the rim7 by a pivoted spring bar 11. The numeral 12 indicates pliable stripssuch as felt, applied to the opposing faces of the plate 3 and clampingboard 9. The numeral 13 indicates a similar facing applied to the innerface of the platen 5. The platen 5 is provided with an upwardly extendedarm or operating handle 14, to the upper end of which a latch trippingfinger 15 is shown as applied.

Preferably the printing frame is detachably secured to the box 1 bylight metal strips 16 secured to the bottom of the box, and providedwith upturned ends for on Specification of Letters Patent.

Patented Jan. 12, 1915.

Serial No. 495,641.

gagement with the lower edge of the plate 3, and by a spring bar 17secured to the top of said box provided with a perforation that engagesa pin 18 on the upper edge of said plate 3.

When the platen 5 and its operating handle 141 are moved from theposition shown in Fig. 3 into the position shown in Fig. 2, the latchtripping finger 15 engages the long lug 19 of an oscillatory latch 20,which latter is pivoted at 21 in the bearing 22 secured on the top ofthe box 1. The hub portion of the bearing latch is provided with twonotches 23 which are adapted to be engaged by the beveled nose of aspring 2 1, which as shown, is secured within the bearing 22 and servesto quite firmly, but yieldingly hold the latch 20 in either of its twopositions. When the latch 20 is moved by engagement of the end of thetripping finger 15 with the lug 19 thereof as just above stated, arelatively short lug 25 there of moves upward through a perforation 26in said finger 15, so that when the hinged platen 5 is moved into anopen position, said latch 20 will be moved back to the position shown inFig. 3. The said latch 20, as is evident, serves to automatically secureand yieldingly hold the platen in its closed or operative position, withthe card or paper to be printed pressed between said platen and thenegative, but permits the platen to be moved into an open position whena little force is applied to the handle 14.

Normally the diffused light which passes into the box 1 through theground plate is cut 0E from the negative 18 by a pair of overlappedshutters 27. The upper shutter 27 is secured, at its upper edge, to arock shaft 28, and the lower shutter is secured at its lower edge to arock shaft 29, both of which shafts are shown as mounted in recesses ofa rectangular flange 30 secured within the box 1. Said shafts 2S and 29project through one side of the box, and are provided outside of the boxrespectively with crank arms 31 and 32, the former of which extendsrearward, and the latter of which extends forward. These two arms 31 and32 are pivotally connected by a rod 33, and one of the said cranksto-wit, as shown, the lower crank 32 is also pivotally connected to thelower end of a rod 34, and it is further attached to the lower end of acoiled spring 35, the upper end of which is attached to the box 1 andexerts a force which normally holds the shutters 27 closed, as shown inFig. 3.

The upper end of the connecting rod 3% is pivotally connected to theouter arm 36 of a rock shaft 37 mounted in suitable bearings 38 on topof the box 1. At its inner end, the shaft 37 is provided with anupwardly extended arm 39 to which the front end of a plunger or push rod40 is pivotally attached. The rearwardly extended end of this plunger 40rests loosely on, and is guided by the upper portion of the bearing 22,and normally its rear end stands in the position shown in Fig. 3, inwhich position it will be engaged by the operating handle 14, while theplaten 5 is being moved from the position shown in Fig. 3 into itsextrerne closed position shown in Figs. 1 and 2.

The movement imparted to the plunger l0 by the final closing movement ofthe platen handle 14: oscillates the rock shaft 37, and through the armand rod connections, moves the shutters 27 into open positions shown inFig. 2, against the tension of the spring 35. This, of course, admitslight through the negative to the card or printing paper which is thenpressed by the platen against the negative. The shutters, as is evident,are automatically opened by the closing movement of the platen and theywill be automatically closed by the spring 35 when the platen is givenits initial movement toward an open position. In fact, the opening andclosing of the shutters takes place While the platen is moving withinthe opening 4 of the back plate 3, and consequently while the saidopening is subsequently closed against the passage of li ht.

lhe printing frame which includes the so-called back plate 3 need beremoved only When the negative is to be changed. The

cards or paper on which the print is to be taken may be applied inposition and printed in very rapid succession by simple movements of thehinged platen 5, which is, of course, accomplished by taking hold of thehandle first, and oscillating the same. All other actions take placeautomatically as a result of movements of the platen.

In actual practice this improved photographic printing machine has beenfound highly efiicient for the purposes had in View.

What I claim is:

In a photographic printing machine, the combination with a box, of aprinting frame detachably secured to the back thereof, and provided witha hinged platen having an upwardly projecting operating handle, andmeans independent of the platen for holding the negative, said boxhaving a light passage to the printing frame, a pair of yieldinglyspring closed shutters normally closing the said light passage to saidprinting frame, and provided with crank arms outside of said box, a rodconnecting the crank arms of said shutters, a rock shaft mounted on topof said box and provided with crank arms at its ends, a rod connect ingthe outer arm of said rock shaft to one of the shutter crank arms, and aplunger pivoted to the other arm of said rock shaft with its free endpositioned to be engaged by the operating handle of said platen, andwhereby said shutter will be opened when said platen is closed and willbe closed when said platen is opened.

In testimony whereof I aliix my signature in presence of two witnesses.

M. H. STANG, J. J. RENDAHL,

Copies 01' this patent may be obtained for five cents each, byaddressing the Commissioner of Patents. Washington, I). G.

